Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 366,982	$ 192,561
Accounts receivable	149,769	81,559
Drilling advances	615	3,805
Other current assets	1,427	3,601
Total current assets	518,793	281,526
PROPERTY, PLANT AND EQUIPMENT
Oil and natural gas properties	2,381,812	2,130,125
Other	7,036	4,412
Accumulated depreciation, depletion and amortization	(1,172,761)	(985,010)
Total property, plant and equipment, net	1,216,087	1,149,527
OTHER ASSETS
Deferred financing costs, net	3,701	6,042
Intangible assets, net	0	9,346
Other long-term assets	8,161	6,979
Total other assets	11,862	22,367
TOTAL ASSETS	1,746,742	1,453,420
CURRENT LIABILITIES
Accounts payable	127,909	62,626
Other current liabilities (Note 6)	90,636	66,323
Total current liabilities	218,545	128,949
LONG-TERM LIABILITIES
Long-term debt, net	388,087	391,115
Asset retirement obligations, net of current	89,715	88,232
Other long-term liabilities	5,146	5,702
Total long-term liabilities	482,948	485,049
COMMITMENTS AND CONTINGENCIES (Note 10)
Additional paid-in capital	1,689,500	1,712,544
Treasury Stock, at cost, 14,168 shares and 5,475 shares in 2021 and 2020, respectively	(164,599)	(38,958)
Accumulated deficit	(708,168)	(1,125,450)
Noncontrolling interest	228,492	291,260
Total equity	1,045,249	839,422
TOTAL LIABILITIES AND EQUITY	1,746,742	1,453,420
Class A Common Stock
Common stock	19	17
Class B Common Stock
Common stock	$ 5	$ 9